I see you have the GMPP upgrade. Could be that you need to solder the connections. When mine was running bad the dealer changed the MAF and it ran OK for a short while and then started acting up again. Soldering connections corrected my problem. There are threads on this, check them out. Good luck!
07 Aggressive NA, 11-06 SOLD 9-17-08
09 WickedGXP9-25-08 Auto, Red calps,shorty antenna,windscreen,side grill & bkup light covers, leather armrests/console & door pockets,de-badged, pulsing 3rd light,red eng cover,GMPP CAI&tune, Probeam/Backbone,Clear bra,garage opener in header, JPM lumbar inserts,SOLO Mach Shty cat bk
09 Aggressive GXP Coupe 4-16-14, #577, Auto,soft top,Red calps,GM tune,GM acc whls,Conti Xtreme contact tires,pulsing 3rd light,red eng cover, probeam & backbone